<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <meta http-equiv="X-UA-Compatible" content="ie=edge" />
  <title>学生就业统计表</title>
  <link rel="stylesheet" href="./iconfont/iconfont.css">
  <link rel="stylesheet" href="css/index.css" />
</head>

<body>
  <h1>学生就业统计表</h1>
  <form class="info" autocomplete="off">
    <input type="text" class="uname" name="uname" placeholder="姓名" />
    <input type="text" class="age" name="age" placeholder="年龄" />
    <input type="text" class="salary" name="salary" placeholder="薪资" />
    <select name="gender" class="gender">
      <option value="男">男</option>
      <option value="女">女</option>
    </select>
    <select name="city" class="city">
      <option value="北京">北京</option>
      <option value="上海">上海</option>
      <option value="广州">广州</option>
      <option value="深圳">深圳</option>
      <option value="曹县">曹县</option>
    </select>
    <button class="add">
      <i class="iconfont icon-tianjia"></i>添加
    </button>
  </form>

  <div class="title">共有数据<span>0</span>条</div>
  <table>
    <thead>
      <tr>
        <th>ID</th>
        <th>姓名</th>
        <th>年龄</th>
        <th>性别</th>
        <th>薪资</th>
        <th>就业城市</th>
        <th>录入时间</th>
        <th>操作</th>
      </tr>
    </thead>
    <tbody>
      <!-- <tr>
        <td>1</td>
        <td>迪丽热巴</td>
        <td>23</td>
        <td>女</td>
        <td>12000</td>
        <td>北京</td>
        <td>2099/9/9 08:08:08</td>
        <td>
          <a href="javascript:">
            <i class="iconfont icon-shanchu"></i>
            删除
          </a>
        </td>
      </tr> -->
     
    </tbody>
  </table>
  <script>
    // 参考数据
    const initData = [
      {
        stuId: 1,
        uname: '迪丽热巴',
        age: 22,
        salary: '12000',
        gender: '女',
        city: '北京',
        time: '2099/9/9 08:08:08'
      }
    ]
    
    const arr = JSON.parse(localStorage.getItem('data')) || []
   //利用map和join方法遍历数组
   const tbody = document.querySelector('tbody')
   function render() {
    //利用map遍历数组，返回对应的tr数组
    const trArr = arr.map(function (ele,index) {
      return`
       <tr>
        <td>${ele.stuId}</td>
        <td>${ele.uname}</td>
        <td>${ele.age}</td>
        <td>${ele.gender}</td>
        <td>${ele.salary}</td>
        <td>${ele.city}</td>
        <td>${ele.time}</td>
        <td>
          <a href="javascript:" data -id="${index}" >
          <i class="iconfont"></i>
          删除
          </a>
          </td>
        </tr>
      `
    })

    console.log(trArr)

    tbody.innerHTML=trArr.join('')
    document.querySelector('.title span').innerHTML=arr.length
   }
   render()
   const info =document.querySelector('.info')    
   const uname = document.querySelector('.uname')
   const age  = document.querySelector('.age')
   const  salary= document.querySelector('.salary')  
   const  gender = document.querySelector('.gender')
   const city = document.querySelector('.city')
    
   //from表单注册提交事件，阻止默认行为
   info.addEventListener('submit',function (e) {
    e.preventDefault()

    if (!uname.value || !age.value ||!salary.value) {
      return alert('输入内容不能为空')
    }

    arr.push({
      stuId:arr.length ? arr[arr.length-1].stuId+1:1,
      uname:uname.value,
      age:age.value,
      salary:salary.value,
      gender:gender.value,
      city:city.value,
      time: new Date().toLocaleString()
    })

    render()
    this.reset()

    localStorage.setItem('click',function (e) {
      if (e.target.tagName==='A') {
        console.log(e.target.dataset.id);
        if (confirm('你确定删除这条数据吗')) {
          arr.splice(e.target.dataset.id,1)
          render()
          localStorage.setItem('data',JSON.stringify(arr))
        }
      }
    })
   })
  </script>
</body>

</html>